Classy Sydney FC down Wanderers in derby

Graham Arnold has declared the Sydney derby the most lopsided in Australian football after Sydney FC surged from behind to topple Western Sydney 3-1.

Adrian Mierzejewski produced another masterclass as driving rain hit a soggy Allianz Stadium pitch, netting a double before Bobo struck late to bring the Sky Blues within touching distance of defending the Premiers' Plate.

Win their next two games and it will be theirs, while the Wanderers continue their fight to stay in the top six.

The result in front of 25,211 marked the Sky Blues' eighth derby win and 12th undefeated from the last 13 meetings.

"Stats don't lie, and this is a pretty lopsided derby - I think the most lopsided derby in Australian football," Arnold said.

"Everyone talks about fatigue and that we had a (ACL) game midweek ... but we were ready to play."

However, Josep Gombau's side reinstated some pride following the last 5-0 derby thrashing.

And was only through former Sydney FC goalkeeper Vedran Janjetovic that Mierzejewski was denied a hat-trick, pulling off an outstanding eighth-minute save in the face of his old supporter base.